CN116762428A - Power saving enhancements for paging reception - Google Patents

Abstract

In a wireless network, a base station may send a paging advance indication (PEI) to a User Equipment (UE) before a Paging Occasion (PO) to indicate whether the UE should wake up to receive a page, which is more energy efficient than conventional paging reception. However, the UE may not universally support PEI. Furthermore, a UE lacking PEI support cannot realize the potential power savings provided by PEI. Thus, the UE may send capability information to the base station indicating whether the UE supports PEI, and the base station may configure paging reception for the UE based at least in part on the capability information. In some aspects, the capability information indicates a minimum gap between messages scheduling pages and messages carrying pages, which allows two-phase wake-up to be implemented for PEI-enabled UEs and PEI-starved UEs.

Description

Power saving enhancements for paging reception

Cross Reference to Related Applications

This patent application claims priority from U.S. provisional patent application No. 63/199,649 entitled "POWER SAVING ENHANCEMENTS FOR PAGING RECEPTION" filed on day 1, month 14 of 2021 and U.S. non-provisional patent application No. 17/455,569 entitled "POWER SAVING ENHANCEMENTS FOR PAGING RECEPTION", filed on day 11, month 18 of 2021, which are expressly incorporated herein by reference.

Technical Field

Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for power saving enhancement for paging reception.

Background

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcast. A typical wireless communication system may employ multiple-access techniques capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access techniques include Code Division Multiple Access (CDMA) systems, time Division Multiple Access (TDMA) systems, frequency Division Multiple Access (FDMA) systems, orthogonal Frequency Division Multiple Access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is an enhanced set of Universal Mobile Telecommunications System (UMTS) mobile standards promulgated by the third generation partnership project (3 GPP).

A wireless network may include several Base Stations (BSs) that may support communication for a number of User Equipments (UEs). The UE may communicate with the BS via the downlink and uplink. The "downlink" (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, the BS may be referred to as a Node B, a gNB, an Access Point (AP), a radio head, a Transmission Reception Point (TRP), a 5G BS, a 5G Node B, and the like.

The above-described wireless communication techniques have been employed in various telecommunications standards to provide a common protocol that enables different wireless communication devices to communicate at the city level, country level, regional level, and/or global level. The 5G, which may also be referred to as a New Radio (NR), is a set of enhancements to the LTE mobile standard promulgated by 3 GPP. NR aims to support mobile broadband internet access by: improving spectral efficiency, reducing costs, improving services, utilizing new spectrum, and using OFDM with Cyclic Prefix (CP) on Downlink (DL) and CP-OFDM and/or SC-FDM (e.g., also known as discrete fourier transform spread OFDM (DFT-s-OFDM)) on Uplink (UL) for better integration with other open standards, as well as supporting beamforming, multiple Input Multiple Output (MIMO) antenna technology, and carrier aggregation. However, as the demand for mobile broadband access continues to increase, further improvements in LTE and 5G technology are needed. Preferably, these improvements should be applicable to other multiple access techniques and telecommunication standards employing these techniques.

Disclosure of Invention

Paging is a procedure for, among other examples, informing a UE in an idle or inactive mode (e.g., radio Resource Control (RRC) idle or inactive mode) that the UE will initiate a mobile terminated call, reacquire system information, and/or receive a Public Warning System (PWS) notification. For example, the base station may send a page (or paging message) to the UE based at least in part on an indication from a network device associated with a tracking area in which the UE is located. Thus, when the UE is in idle or inactive mode, the UE may wake up periodically during a Paging Occasion (PO), which refers to a particular subframe within a paging frame associated with the UE. In the event that the UE detects paging information related to the UE during the PO, the UE may decode and process the paging information (e.g., by initiating a mobile terminated call, reacquiring system information, and/or generating an alert related to the PWS notification). Otherwise, in case the UE does not detect paging information related to the UE during the PO, the UE may return to idle or inactive mode to save power and wake up again during the next PO. Thus, existing paging techniques may be power inefficient because the UE activates the entire receive chain to decode the Physical Downlink Shared Channel (PDSCH) that may carry paging messages, even though the PO may not have paging messages intended for the UE.

Thus, in some cases, the wireless network may support a paging advance indication (PEI), sometimes referred to as a Wake Up Signal (WUS), to improve power efficiency associated with paging reception at the UE. For example, PEI (or WUS) is a special signal that the base station sends to the UE before the PO associated with the UE to indicate whether the UE should wake up to receive paging messages. In this way, the UE may only monitor the Physical Downlink Control Channel (PDCCH) to determine if the base station transmits PEI to indicate that the UE will wake up to receive paging messages, and may return to a low power state if PEI is not transmitted and/or if PEI indicates that no paging for the UE is intended in the associated PO. For example, PEI enables the UE to wake up in two phases, including a first phase in which the UE activates only a portion of the receive chain to monitor PDCCH for PEI and a second phase in which the UE activates the remaining portion of the receive chain to receive and decode PDSCH carrying paging messages only when the PEI indicates that there is a page in the associated PO intended for the UE. However, UEs communicating in a wireless network may not be able to universally support PEI before PO. Thus, the base station may not be able to determine whether and/or how to configure PEI for UEs with different capabilities. Furthermore, the UE may not achieve potential power savings from two phase wakeup in the event that the UE does not support PEI before the associated PO.

Some aspects described herein relate to techniques and apparatus for configuring paging reception in a manner that may provide power savings to PEI-enabled UEs and PEI-deficient UEs. For example, as described in further detail herein, a UE may send capability information to a base station indicating whether the UE supports PEI before a PO associated with the UE, and the base station may configure paging reception for the UE based at least in part on the capability information. For example, the base station may configure paging reception using PEI prior to the PO for the UE, the PEI indicating the capability to support PEI, and may configure paging reception using separate paging Downlink Control Information (DCI) to schedule paging PDSCH for the UE, the DCI indicating that PEI cannot be supported and cross-slot scheduling can be supported. For example, in some aspects, the capability information sent from the UE to the base station may indicate a minimum gap between a first message scheduling a page and a second message carrying the page (e.g., paging PDSCH). For example, the first message may be PEI for a UE supporting PEI or paging DCI sent one or more slots before a second message carrying paging for a UE supporting cross-slot scheduling without supporting PEI. In this way, the base station may determine an appropriate paging reception configuration based on the capabilities of the UE, and the paging reception configuration may allow two-phase wake-up for PEI-enabled UEs and PEI-deficient UEs.

In some aspects, a method of wireless communication performed by a UE includes: transmitting capability information to the base station indicating whether the UE supports PEI before a PO associated with the UE, wherein the capability information further indicates a minimum gap between a first message scheduling a page and a second message carrying the page; and monitoring the control channel for the first message based at least in part on the capability information while in the inactive or idle state.

In some aspects, a UE for wireless communication includes a memory and one or more processors coupled to the memory, the one or more processors configured to: transmitting capability information to the base station indicating whether the UE supports PEI before a PO associated with the UE, wherein the capability information further indicates a minimum gap between a first message scheduling a page and a second message carrying the page; and monitoring the first message for a control channel while in an inactive or idle state based at least in part on the capability information.

In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: transmitting capability information to the base station indicating whether the UE supports PEI before a PO associated with the UE, wherein the capability information further indicates a minimum gap between a first message scheduling a page and a second message carrying the page; and monitoring the first message for a control channel while in an inactive or idle state based at least in part on the capability information.

In some aspects, an apparatus for wireless communication includes means for transmitting capability information to the base station indicating whether the apparatus supports PEI prior to a PO associated with the base station, wherein the capability information further indicates a minimum gap between a first message scheduling a page and a second message carrying the page; and means for monitoring the first message for a control channel based at least in part on the capability information while in an inactive or idle state.

Aspects generally include a method, apparatus, system, computer program product, non-transitory computer readable medium, user equipment, base station, wireless communication device, and processing system as substantially described with reference to and as illustrated in the accompanying drawings and description.

The foregoing has outlined rather broadly the features and technical advantages of examples in accordance with the present disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the concepts disclosed herein, both as to their organization and method of operation, together with the associated advantages will be better understood from the following description when considered in connection with the accompanying drawings. Each of the figures is provided for the purpose of illustration and description, and not as a definition of the limits of the claims.

Drawings

Fig. 1 is a diagram illustrating an example of a wireless network.

Fig. 2 is a diagram illustrating an example of a base station communicating with a UE in a wireless network.

Fig. 3A-3B are diagrams illustrating examples of paging configurations.

Fig. 4A-4C are diagrams illustrating examples associated with power saving enhancements for paging reception.

FIG. 5 is a flow chart of an exemplary method of wireless communication;

fig. 6 is a block diagram of an exemplary apparatus for wireless communication.

Fig. 7 is a diagram illustrating an example of a hardware implementation of an apparatus employing a processing system.

Detailed Description

The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. It will be apparent, however, to one skilled in the art that the concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring such concepts.

Aspects of a telecommunications system will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

For example, an element, or any portion of an element, or any combination of elements, may be implemented as a "processing system" that includes one or more processors. Examples of processors include microprocessors, microcontrollers, digital Signal Processors (DSPs), field Programmable Gate Arrays (FPGAs), programmable Logic Devices (PLDs), state machines, gate logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout this disclosure. One or more processors in a processing system may execute software. Software should be construed broadly to mean instructions, instruction sets, code segments, program code, programs, subroutines, software modules, applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like, whether related to software, firmware, middleware, microcode, hardware description language, or otherwise.

Thus, in one or more example embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer readable media includes computer storage media. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise Random Access Memory (RAM), read-only memory (ROM), electrically Erasable Programmable ROM (EEPROM), compact disk ROM (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic storage devices, combinations of the above-described types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

It should be noted that although aspects are described herein using terms commonly associated with 5G or NR Radio Access Technologies (RATs), aspects of the present disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and/or RAT after 5G (e.g., 6G).

Fig. 1 is a diagram illustrating a wireless network 100 in which aspects of the present disclosure may be practiced. The wireless network 100 may be or may include elements of a 5G (NR) network and/or an LTE network, among other examples. Wireless network 100 may include several base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110 d) and other network entities. A Base Station (BS) is an entity that communicates with User Equipment (UE) and may also be referred to as a 5G BS, node B, gNB, 5G NB, access point, transmission-reception point (TRP), etc. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" can refer to a coverage area of a BS and/or a BS subsystem serving the coverage area, depending on the context in which the term is used.

The BS may provide communication coverage for a macrocell, a picocell, a femtocell, and/or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. The pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access to UEs associated with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG)). The BS for the macro cell may be referred to as a macro BS. The BS for the pico cell may be referred to as a pico BS. The BS for the femto cell may be referred to as a femto BS or a home BS. In the example shown in fig. 1, BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102 c. The BS may support one or more (e.g., three) cells. The terms "eNB," "base station," "5G BS," "gNB," "TRP," "AP," "node B," "5G NB," and "cell" may be used interchangeably herein.

In some examples, the cells may not necessarily be stationary, and the geographic area of the cells may move according to the positioning of the mobile BS. In some examples, BSs may interconnect each other and/or to one or more other BSs or network nodes (not shown) in wireless network 100 through various types of backhaul interfaces, such as direct physical connections or virtual networks using any suitable transmitting network.

The wireless network 100 may also include relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., BS or UE) and transmit the transmission of data to a downstream station (e.g., UE or BS). The relay station may also be a UE capable of relaying transmissions for other UEs. In the example shown in fig. 1, relay BS 110d may communicate with macro BS 110a and UE 120d to facilitate communications between BS 110a and UE 120 d. The relay BS may also be referred to as a relay station, a relay base station, a relay, etc.

The wireless network 100 may be a heterogeneous network including different types of BSs (such as macro BS, pico BS, femto BS, relay BS, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, femto BS, and relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

The network controller 130 may be coupled to a set of BSs and may provide coordination and control for the BSs. The network controller 130 may communicate with the BS via a backhaul. The BSs may also communicate with each other directly or indirectly, e.g., via a wireless or wired backhaul.

UEs 120 (e.g., 120a, 120b, 120 c) may be dispersed throughout wireless network 100, and each UE may be stationary or mobile. A UE may also be called an access terminal, mobile station, subscriber unit, station, etc. The UE may be a cellular telephone (e.g., a smart phone), a Personal Digital Assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a Wireless Local Loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, a super book, a medical device or equipment, a biometric sensor/device, a wearable device (smart watch, smart garment, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., music or video device, or satellite radio), a vehicle component or sensor, a smart meter/sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

Some UEs may be considered Machine Type Communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC wireless devices include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which may communicate with a base station, another device (e.g., a remote device), or some other entity. The wireless node may provide connectivity to a network (e.g., a wide area network such as the internet or a cellular network) or to a network, for example, via a wired or wireless communication link. Some UEs may be considered internet of things (IoT) devices and/or may be implemented as NB-IoT (narrowband internet of things) devices. Some UEs may be considered Customer Premises Equipment (CPE). UE 120 may be included within a housing that houses components of UE 120, such as processor components, memory components, and the like.

In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a particular RAT and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, an air interface, etc. The frequency may also be referred to as a carrier wave, frequency channel, etc. Each frequency may support a single RAT in a given geographical area in order to avoid interference between wireless networks of different RATs. In some cases, a 5G RAT network may be deployed.

In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120 e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more side-uplink channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol or a vehicle-to-infrastructure (V2I) protocol), and/or a mesh network. In this case, UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by base station 110.

Devices of the wireless network 100 may communicate using electromagnetic spectrum that may be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, devices of wireless network 100 may communicate using an operating frequency band having a first frequency range (FR 1) that may span 410MHz to 7.125GHz, and/or may communicate using an operating frequency band having a second frequency range (FR 2) that may span 24.25GHz to 52.6GHz. The frequency between FR1 and FR2 is sometimes referred to as the mid-band frequency. Although a portion of FR1 is greater than 6GHz, FR1 is commonly referred to as the "below 6GHz" band. Similarly, FR2 is commonly referred to as the "millimeter wave" band, although it is distinct from the Extremely High Frequency (EHF) band (30 GHz-300 GHz) identified by the International Telecommunications Union (ITU) as the "millimeter wave" band. Thus, unless specifically stated otherwise, it should be understood that the term "below 6GHz" and the like, if used herein, may broadly refer to frequencies less than 6GHz, frequencies within FR1, and/or intermediate band frequencies (e.g., greater than 7.125 GHz). Similarly, unless specifically stated otherwise, it should be understood that the term "millimeter wave" or the like, if used herein, may broadly refer to frequencies within the EHF band, frequencies within FR2, and/or mid-band frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified and that the techniques described herein are applicable to those modified frequency ranges.

In wireless network 100, a paging procedure may be used to notify UE 120 in an idle or inactive mode (e.g., radio Resource Control (RRC) idle or inactive mode) to initiate a mobile terminated call, reacquire system information, and/or receive a Public Warning System (PWS) notification. For example, base station 110 may send a page (or paging message) to UE 120 based at least in part on an indication from a network device associated with a tracking area in which UE 120 is located. Thus, when UE 120 is in idle or inactive mode, UE 120 may periodically wake up during a Paging Occasion (PO), which refers to a particular subframe within a paging frame associated with UE 120. In the event that UE 120 detects paging information related to UE 120 during the PO, UE 120 may decode and process the paging information (e.g., by initiating a mobile terminated call, reacquiring system information, and/or generating an alert related to the PWS notification). Otherwise, in the event that UE 120 does not detect paging information related to UE 120 during a PO, UE 120 may return to an idle or inactive mode to save power and wake up again during the next PO. Thus, existing paging techniques may be power inefficient because UE 120 activates the entire receive chain to decode the Physical Downlink Shared Channel (PDSCH) that may carry paging messages, even though the PO may not be intended for the paging message of UE 120.

Thus, in some cases, wireless network 100 may support a paging advance indication (PEI), sometimes referred to as a Wake Up Signal (WUS), to improve power efficiency associated with paging reception at UE 120. For example, PEI (or WUS) is a special signal that base station 110 sends to UE 120 before the PO associated with UE 120 to indicate whether UE 120 should wake up to receive paging messages. In this way, UE 120 may only monitor the Physical Downlink Control Channel (PDCCH) to determine whether the base station transmits PEI to indicate that UE 120 will wake up to receive paging messages, and may return to a low power state if PEI is not transmitted and/or if PEI indicates that there is no page in the associated PO intended for UE 120. For example, PEI enables UE 120 to wake up in two phases, including a first phase in which UE 120 activates only a portion of the receive chain to monitor PDCCH for PEI and a second phase in which UE 120 activates the remaining portion of the receive chain to receive and decode PDSCH carrying paging message only when PEI indicates that there is a page in the associated PO intended for UE 120. However, UEs 120 communicating in the wireless network 100 may not generally support PEI prior to the PO. Thus, the base station 110 may not be able to determine whether and/or how to configure PEI for UEs 120 with different capabilities. Furthermore, where UE 120 does not support PEI prior to the associated PO, UE 120 may not be able to achieve potential power savings from two-phase wakeup.

Some aspects described herein relate to techniques and apparatus for configuring paging reception in a manner that may provide power savings to PEI-enabled UEs 120 and PEI-deficient UEs 120. For example, as described in further detail herein, UE 120 may send capability information to base station 110 indicating whether UE 120 supports PEI prior to a PO associated with UE 120, and base station 110 may configure paging reception for UE 120 based at least in part on the capability information. For example, base station 110 may configure paging reception prior to the PO for UE 120 using PEI indicating the capability to support PEI, and may configure paging reception using paging Downlink Control Information (DCI) alone to schedule paging PDSCH for UE 120, the DCI indicating that PEI cannot be supported and cross-slot scheduling can be supported. For example, in some aspects, the capability information sent from UE 120 to base station 110 may indicate a minimum gap between a first message scheduling a page and a second message carrying the page (e.g., paging PDSCH). For example, the first message may be PEI for the PEI-enabled UE 120 or paging DCI sent one or more slots prior to the second message carrying paging for the UE 120 supporting cross-slot scheduling without supporting PEI. In this way, the base station 110 may determine an appropriate paging reception configuration based on the UE capabilities, and the paging reception configuration may allow for two-phase wake-up for PEI-enabled UEs 120 and PEI-deficient UEs 120.

As mentioned above, fig. 1 is provided as an example only. Other examples may differ from what is described in connection with fig. 1.

Fig. 2 is a diagram illustrating an example 200 of a base station 110 in communication with a UE 120 in a wireless network 100. Base station 110 may be equipped with T antennas 234a through 234T and UE 120 may be equipped with R antennas 252a through 252R, where typically T is 1 and R is 1.

At base station 110, transmit processor 220 may receive data for one or more UEs from data source 212, may select a Modulation and Coding Scheme (MCS) for each UE based at least in part on a Channel Quality Indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., semi-Static Resource Partitioning Information (SRPI)) and control information (e.g., CQI requests, grants, and/or upper layer signaling) and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS), phase Tracking Reference Signals (PTRS), and/or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary Synchronization Signals (PSS) or Secondary Synchronization Signals (SSS)). A Transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T Modulators (MODs) 232a through 232T. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 may also process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232T may be transmitted via T antennas 234a through 234T, respectively.

At UE 120, antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 may also process input samples (e.g., for OFDM) to obtain received symbols. MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254R, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. A Receive (RX) processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280. The term "controller/processor" may refer to one or more controllers, one or more processors, or a combination thereof. Among other examples, the channel processor may determine a Reference Signal Received Power (RSRP) parameter, a Received Signal Strength Indicator (RSSI) parameter, a Reference Signal Received Quality (RSRQ) parameter, and/or a CQI parameter. In some aspects, one or more components of UE 120 may be included in housing 284.

The network controller 130 may include a communication unit 294, a controller/processor 290, and a memory 292. The network controller 130 may comprise, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via a communication unit 294.

The antennas (e.g., antennas 234a through 234t and/or antennas 252a through 252 r) may include one or more antenna panels, groups of antennas, sets of antenna elements and/or antenna arrays, etc., or may be comprised in one or more antenna panels, groups of antennas, sets of antenna elements and/or antenna arrays, etc., among other examples. The antenna panel, antenna group, set of antenna elements, and/or antenna array may include one or more antenna elements. The antenna panel, antenna group, set of antenna elements, and/or antenna array may include a set of coplanar antenna elements and/or a set of non-coplanar antenna elements. The antenna panel, antenna group, set of antenna elements, and/or antenna array may include antenna elements within a single housing and/or antenna elements within multiple housings. The antenna panel, antenna group, set of antenna elements, and/or antenna array may include one or more antenna elements coupled to one or more transmit and/or receive components, such as one or more components of fig. 2.

On the uplink, at UE 120, transmit processor 264 may receive and process data from data source 262 and control information from controller/processor 280 (e.g., for reports including RSRP, RSSI, RSRQ and/or CQI). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some aspects, a modulator and demodulator (e.g., MOD/DEMOD 254) of UE 120 may be included in the modem of UE 120. In some aspects, UE 120 includes a transceiver. The transceiver may include any combination of antenna(s) 252, modulator and/or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, and/or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller/processor 280) and memory 282 to perform aspects of any of the methods described herein.

At base station 110, uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 (if applicable), and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120. The receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to a controller/processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. Base station 110 may include a scheduler 246 to schedule UEs 120 for downlink and/or uplink communications. In some aspects, a modulator and demodulator (e.g., MOD/DEMOD 232) of base station 110 may be included in the modem of base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antenna(s) 234, modulator and/or demodulator 232, MIMO detector 236, receive processor 238, transmit processor 220, and/or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller/processor 240) and memory 242 to perform aspects of any of the methods described herein. The scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.

The controller/processor 240 of the base station 110, the controller/processor 280 of the UE 120, and/or any other component(s) of fig. 2 may perform one or more techniques associated with power saving enhancements for paging reception, as described in more detail elsewhere herein. For example, controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component(s) of fig. 2 may perform or direct operations of, for example, method 500 of fig. 5 and/or other methods described herein. Memories 242 and 282 may store data and program codes for BS 110 and UE 120, respectively. In some aspects, memory 242 and/or memory 282 may include non-transitory computer-readable media storing one or more instructions (e.g., code and/or program code) for wireless communication. For example, the one or more instructions, when executed by one or more processors of base station 110 and/or UE 120 (e.g., directly, or after compilation, conversion, and/or interpretation), may cause the one or more processors, UE 120, and/or base station 110 to perform or direct operations such as method 500 of fig. 5 and/or other processes as described herein. In some aspects, the execution instructions may include, among other examples, execution instructions, conversion instructions, compilation instructions, and/or interpretation instructions.

In some aspects, UE 120 includes means for sending capability information to base station 110 indicating whether the UE supports PEI prior to a PO associated with UE 120, wherein the capability information further indicates a minimum gap between a first message scheduling a page and a second message carrying the page; and/or means for monitoring a control channel for the first message based at least in part on the capability information while in an inactive or idle state. Means for UE 120 to perform the operations described herein may include, for example, one or more of antennas 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller/processor 280, or memory 282.

In some aspects, UE 120 includes means for receiving a second message carrying a page based at least in part on scheduling information included in the paging DCI.

In some aspects, UE 120 includes means for receiving information from base station 110 to configure PEI opportunities prior to each PO associated with the UE paging group based at least in part on the minimum gap indicated in the capability information.

In some aspects, UE 120 includes means for detecting a PEI message in a PEI occasion prior to a PO associated with the UE paging group; and/or means for determining to schedule at least one page in the PO after detecting the PEI occasion of the PEI message.

In some aspects, UE 120 includes means for decoding a second message carrying at least one page based at least in part on the PEI message indicating that at least one page scheduled in the PO after the PEI occasion includes a page for one or more UEs in the UE paging group.

In some aspects, UE 120 includes means for refraining from decoding the second message carrying the at least one page based at least in part on the PEI message indicating that the at least one page scheduled in the PO after the PEI occasion does not include a page for any UE in the UE paging group.

In some aspects, UE 120 includes means for receiving configuration information from base station 110 that instructs UE 120 to avoid decoding the second message or to monitor the control channel for a paging indication associated with a PO following a PEI occasion that satisfies the condition; and/or means for operating according to the configuration information in the PO after the PEI occasion that satisfies the condition.

In some aspects, UE 120 includes means for determining that the PEI occasion is invalid based at least in part on the PEI occasion overlapping one or more of the downlink reference signals or the radio resource management measurement window.

In some aspects, UE 120 includes means for measuring one or more reference signals to enable receipt of a second message based at least in part on detecting the first message on the control channel, wherein a configuration associated with the one or more reference signals is indicated in a Master Information Block (MIB) or a System Information Block (SIB) other than the SIB carrying information provided by base station 110 to enable access to the cell.

As noted above, fig. 2 is provided as an example only. Other examples may differ from what is described in connection with fig. 2.

Fig. 3A-3B are diagrams illustrating examples 300, 350 of paging configurations. For example, fig. 3A illustrates an example 300 of a paging reception configuration in which a UE in an idle or inactive mode monitors a control channel (e.g., PDCCH) during a PO within a paging frame configured for the UE to determine whether to schedule paging for the UE during the PO. For example, at 302, a UE may determine a paging frame within a Discontinuous Reception (DRX) cycle configured for the UE. The paging frame may generally represent a reference frame or a start frame of the POs associated with the UE because the POs associated with the paging frame may begin in or after the paging frame due to multi-beam operation and/or PO repetition.

Thus, in some aspects, a base station may configure paging reception for a UE by indicating the number of radio frames in a DRX cycle, which may have a cell-specific value or a UE-specific value. In general, the DRX cycle may be configured to include 32, 64, 128, or 256 radio frames, and the base station may also configure an interval between adjacent paging frames (e.g., 1, 2, 4, 8, or 16 radio frames) and a time domain offset in frames for the paging frames (e.g., from zero to N frames, where N is one less than the interval between adjacent paging frames). In some aspects, the number of paging frames in each DRX cycle may be based at least in part on the number of radio frames and the interval between adjacent paging frames. For example, in fig. 3A, the DRX cycle includes 32 radio frames, each radio frame is 10 ms, the interval between adjacent paging frames is 8 radio frames (or 80 ms), and the time domain offset is 6 radio frames, resulting in four (4) paging frames in the DRX cycle. The UE may determine a particular paging frame associated with the UE among the paging frames in the DRX cycle based on an identifier assigned to the UE.

As further shown in fig. 3A, at 304, the UE may determine a PO in a paging frame associated with the UE, and the UE may monitor a control channel for a paging indication associated with the UE during the PO associated with the UE. For example, the base station may configure the number of POs per paging frame (e.g., 1,2, or 4 POs per paging frame), and the UE may determine a PO index (i) associated with the UE based on the identifier assigned to the UE _s ). In general, each PO may contain a set of S X consecutive PDCCH monitoring occasions, where S is the number of actually transmitted Synchronization Signal Blocks (SSBs) indicated in a SIB carrying information provided by the base station that enables access to the cell (e.g., SIB 1), and X is the number of PDCCH monitoring occasions for each SSB in the PO (e.g., 1,2, 3, or 4). POi _s Configured by a base station or based on i _s * S X, where X s+k is the value of paging in PO]The PDCCH monitoring occasions correspond to the kth transmitted SSB, where x=0, 1, …, X-1, k=1, 2, …, S.

In some aspects, when the UE is in idle or inactive mode, the UE may wake up from idle or inactive mode once in each DRX cycle during the PO associated with the UE, as determined in the manner described above. When the UE wakes up from idle or inactive mode, the UE typically does not know whether there will be a page for the UE during the PO. Thus, when a UE wakes up during a PO associated with the UE, the entire receive chain is activated to enable the UE to receive and decode pages that may be carried on the PDSCH. This may increase power consumption at the UE because components required to receive and decode the paging PDSCH may not need to be activated if paging for the UE is not scheduled.

Thus, in some cases, the wireless network may support a paging advance indication (PEI), sometimes referred to as a Wake Up Signal (WUS), to improve power efficiency associated with paging reception at the UE. For example, as shown in fig. 3B, PEI (or WUS) is a special signal that the base station sends to the UE before the PO associated with the UE to indicate whether the UE should wake up to receive paging messages. In this way, the UE may only monitor the PDCCH to determine if the base station transmits PEI to indicate that the UE will wake up to receive paging messages, and may return to a low power state if PEI is not transmitted and/or if PEI indicates that no paging for the UE is intended in the associated PO. Alternatively, when PEI is sent to indicate that the UE should wake up to receive paging messages, the UE may wake up completely to receive PDSCH carrying paging messages. In such cases, after the UE receives PEI indicating that the UE has paging, the UE may additionally measure one or more reference signals (e.g., one or more SSBs, tracking Reference Signals (TRSs), and/or channel state information reference signals (CSI-RS)) to synchronize with the base station and improve decoding of PDSCH carrying the paging message. For example, as shown at 352, where the channel between the base station and the UE has good link quality, the PEI may be placed relatively close to the next PO because the time remaining after the UE processes the reference signal transmission may not be long enough to transition to deep sleep (e.g., one reference signal sample may be sufficient to reliably decode the paging PDSCH). Otherwise, as shown at 354, a longer gap may be provided between the PEI and the next PO to allow the UE to obtain multiple reference signal samples between the PEI and the next PO when the channel quality between the base station and the UE is poor.

In this way, the PEI enables the UE to wake up in two phases, including a first phase in which the UE activates only a portion of the receive chain to monitor the PDCCH for the PEI and a second phase in which the UE activates the remaining portion of the receive chain to receive and decode the paging PDSCH (and/or measurement or sampling reference signals) if the PEI indicates that there is a page for the UE in the associated PO. However, UEs communicating in a wireless network may not be able to universally support PEI before PO. Thus, the base station may not be able to determine whether and/or how to configure PEI for UEs with different capabilities. Furthermore, the UE may not achieve potential power savings from two phase wakeup in the event that the UE does not support PEI before the associated PO. Accordingly, some aspects described herein relate to techniques and apparatus for configuring paging reception in a manner that may provide power savings to PEI-enabled UEs and UEs lacking PEI support. For example, as described in more detail below with reference to fig. 4A-4C, a UE may send capability information to a base station indicating whether the UE supports PEI before a PO associated with the UE, and the base station may configure paging reception for the UE based at least in part on the capability information. For example, the base station may use PEI to configure paging reception prior to the PO for the UE to indicate the capability to support PEI, and may use separate paging Downlink Control Information (DCI) to configure paging reception to schedule paging PDSCH for the UE indicating that PEI cannot be supported and cross-slot scheduling can be supported. For example, in some aspects, the capability information sent from the UE to the base station may indicate a minimum gap between a first message scheduling a page and a second message carrying the page (e.g., paging PDSCH). For example, the first message may be PEI for a UE supporting PEI or paging DCI sent one or more slots before a second message carrying paging for a UE supporting cross-slot scheduling without supporting PEI. In this way, the base station may determine an appropriate paging reception configuration based on the capabilities of the UE, and the paging reception configuration may allow two-phase wake-up for PEI-enabled UEs and PEI-deficient UEs.

As described above, fig. 3A-3B are provided as examples. Other examples may differ from what is described in connection with fig. 3A-3B.

Fig. 4A-4C are diagrams illustrating an example 400 associated with power saving enhancements for paging reception. As shown in fig. 4A-4C, example 400 includes communication between a base station (e.g., base station 110) and a UE (e.g., UE 120). In some aspects, the base station and the UE may be included in a wireless network, such as wireless network 100. The base station and the UE may communicate via a wireless access link, which may include an uplink and a downlink.

As shown in fig. 4A, at 410, the UE may send capability information related to paging reception to the base station. For example, in some aspects, the capability information may indicate whether the UE supports a paging reception configuration in which PEI is sent prior to a PO associated with the UE to indicate whether the UE is to wake up to receive pages during the PO. Further, the capability information may indicate a minimum gap supported by the UE between a first message scheduling paging and a second message carrying paging. For example, where the UE supports PEI-based paging reception configuration, the capability information may indicate a minimum gap between PEI occasions configured for the UE and paging PDSCH occasions following the PEI occasions supported by the UE (e.g., based on the number of SSB measurements and/or other reference signal measurements that the UE needs to reliably decode PDSCH carrying paging messages for the UE).

Alternatively, in the event that the UE does not support a paging reception configuration that transmits PEI prior to the PO associated with the UE, the UE may still achieve the same or similar power saving advantages if the UE supports cross-slot scheduling. For example, in a cross-slot scheduling configuration, the UE may receive a paging DCI message that schedules a paging PDSCH in a first slot, and the paging DCI may schedule the paging PDSCH in a second slot. In this case, if a gap with a sufficient width is configured between paging DCI and paging PDSCH, the UE may implement two-phase wake-up (e.g., the UE may consume less power to monitor paging DCI than conventional PDCCH monitoring, and may save additional power by skipping paging PDSCH if there is no paging message for the UE). Thus, since the UE can achieve power saving comparable to PEI configuration using cross-slot scheduling, the capability information transmitted to the base station may indicate a minimum k0 defining the minimum number of slots between paging DCI and paging PDSCH supported by the UE, so that the base station may schedule the UE according to the minimum k0 supported by the UE.

As further shown in fig. 4A, at 412, the base station may transmit and the UE may receive information that configures paging reception at the UE based at least in part on the capability information indicated by the UE. For example, as described in more detail below with reference to fig. 4B, the base station may configure paging reception for the UE if the UE indicates lack of PEI support. Alternatively, as described in more detail below with reference to fig. 4C, the base station may configure paging reception for the UE if the UE indicates PEI is supported.

For example, fig. 4B illustrates communications between a base station and a UE that may occur if the UE indicates that PEI is not supported. As shown at 420, the base station may transmit information to the UE to configure paging reception at the UE based at least in part on the UE indicating lack of PEI support. Further, the information configuring paging reception may depend on whether capability information signaled by the UE indicates that the UE supports cross-slot scheduling (e.g., where paging DCI is received in a first slot to schedule paging PDSCH in a second slot). For example, in some aspects, a base station may configure a set of dedicated POs for UEs that do not support cross-slot scheduling, which may be referred to herein as class a UEs, and a base station may configure a separate set of dedicated POs for UEs that support cross-slot scheduling, which may be referred to herein as class B UEs. Thus, in the event that the UE indicates lack of PEI support and lack of support for cross-slot scheduling (e.g., the UE is a class a UE), the paging reception configuration information may indicate that the UE is to monitor the PDCCH for paging indications for the UE using a dedicated PO set for the class a UE (e.g., in a similar manner as described above with reference to fig. 3A). Alternatively, in the event that the UE indicates lack of PEI support and support for cross-slot scheduling (e.g., the UE is a class B UE), the paging reception configuration information may indicate that the UE is to monitor individual paging DCIs to schedule paging PDSCH in the dedicated PO set for the class B UE (e.g., based on a minimum k0 signaled by the UE). Alternatively, instead of configuring a single set of POs for both class a and class B UEs, the base station may configure a single set of POs to be shared by both class a and class B UEs (e.g., to maximize resource utilization of the paging channel).

Additionally or alternatively, the information configuring paging reception at the UE may indicate that the base station may support two UE paging groups, which may include a first UE paging group including UEs that do not support cross-slot scheduling (e.g., class a UEs) and a second UE paging group including UEs that support cross-slot scheduling (e.g., class B UEs). In this case, the first UE paging group and the second UE paging group may share the same PO, and when the base station sends a paging indication (e.g., as described below), the base station may signal whether the page is intended for the first UE paging group or the second UE paging group. For example, in some aspects, a base station may use a field in paging DCI to signal whether the page is intended for a first UE paging group or a second UE paging group. Additionally or alternatively, the base station may assign a first Radio Network Temporary Identifier (RNTI) (e.g., a first paging RNTI (P-RNTI)) to the first UE paging group and a second RNTI (e.g., a second P-RNTI) to the second UE paging group. In this case, when transmitting paging DCI, the base station may scramble the paging DCI with an RNTI assigned to a UE paging group intended to receive paging.

Further, in some aspects, the information configuring paging reception for the UE may include configuration information associated with TRSs, CSI-RSs, and/or other suitable reference signals that the UE may measure in order to increase reliability of decoding the paging PDSCH. For example, the TRS or CSI-RS configuration may be relatively static such that UEs in idle or inactive mode do not need to update the configuration information of the TRS or CSI-RS frequently. In addition, there is no strong delay requirement for the UE to obtain configuration information for TRS or CSI-RS. On the other hand, space in a Master Information Block (MIB) or other System Information Block (SIB) carrying information provided by the base station to enable access to the cell may be reserved for configurations most critical to UE access. Thus, in some aspects, configuration information for a TRS or CSI-RS may be signaled in SIBs other than MIB or SIBs that carry information provided by a base station (e.g., SIB 1) that enables access to a cell. For example, because the purpose of the TRS and CSI-RS configurations is to enable the UE to measure the reference signals used for the paging procedure while in idle or inactive mode, the SIB used to indicate the configuration for the TRS or CSI-RS may be SIB11 used to signal the measurement configuration for the UE in RRC idle or inactive mode. Further, since the TRS or CSI-RS configuration is signaled to the UE in idle or inactive mode to improve the efficiency of use of network resources, the TRS or CSI-RS configuration may be provided in signaling (e.g., broadcast signaling rather than dedicated signaling) addressed to multiple UEs.

As further shown in fig. 4B, at 422, the UE may monitor for paging messages addressed to the UE during the PO configured for the UE (e.g., depending on whether the UE is a class a UE, whether the UE is a class B UE, or whether the base station configures a PO set to be shared by a class a UE and a class B UE). For example, if the UE is a class a UE that lacks support for PEI and lacks support for cross-slot scheduling, the UE may monitor PDCCH for a paging indication for the UE in a PO configured for the UE. Alternatively, if the UE is a class B UE that lacks support for PEI but supports cross-slot scheduling, the UE may monitor paging DCI for scheduling paging PDSCH in subsequent slots.

As further shown in fig. 4B, at 424, the base station may transmit one or more reference signals and/or one or more paging messages based at least in part on whether the UE supports cross-slot scheduling (e.g., information transmitted to the UE may be configured based on whether the paging message is received by only class a UEs, only class B UEs, or both class a and class B UEs). For example, in some aspects, one or more reference signals may be transmitted based on configuration information indicated in the SIB to enable the UE to reliably decode the paging PDSCH. Furthermore, in case different dedicated PO sets are configured for class a UEs and class B UEs, the paging message may be configured accordingly. However, in the case of configuring the shared PO set for both class a and class B UEs, the paging DCI for the class B UE may include additional indications to enable the class B UE to obtain the paging PDSCH scheduled by the paging DCI and/or to indicate that the class B UE may skip paging PDSCH occasions. For example, if only a class a UE has paging in a particular PO, the indication may not be set in paging DCI, whereby the class B UE may skip paging PDSCH occasions because there is no paging for the class B UE. Alternatively, if only class B UEs have paging in a particular PO, an indication in the paging DCI may be set to indicate that class B UEs will receive the paging PDSCH using scheduling information included in the paging DCI received in the current PO. Alternatively, if both class a and class B UEs have paging in a particular PO, the indication in the paging DCI may indicate that the class B UE is to obtain the paging PDSCH in a first PO that is at least K slots after the current PO, where K is the maximum of all minimum K0 values supported by the class B UE with paging in the current PO.

Further, in the case where paging DCI is used for a UE supporting cross-slot scheduling, the paging DCI may explicitly and dynamically signal whether a TRS or CSI-RS is available. For example, in some aspects, a base station may not always transmit a TRS or CSI-RS even when signaling configuration information for the TRS or CSI-RS to a UE (e.g., when there is no UE in RRC connected mode). In such cases, the base station may signal that no TRS or CSI-RS are available so that the UE may avoid performing a power-expensive blind decoding procedure in the TRS or CSI-RS occasions when no TRS or CSI-RS is transmitted. In this way, the availability (or unavailability) of the TRS or CSI-RS may be signaled in the paging DCI before scheduling the POs of the paging PDSCH, which may allow the UE to determine whether to measure or avoid measuring the reference signal(s) before attempting to decode the page.

Alternatively, fig. 4C illustrates communications occurring between a base station and a UE if the UE indicates that PEI is supported, according to some aspects. As shown at 430, the base station may transmit information to the UE to configure paging reception at the UE based at least in part on the UE indicating support for PEI. Typically, as described above, PEI is sent at a location prior to the PO to indicate whether a UE associated with the PEI is to wake up to receive a page. Thus, because the purpose of the PEI is to indicate whether the UE has a page in the POs, each PO may have an associated PEI occasion in a location before the PO. Thus, in some aspects, the configuration information signaled to the UE may indicate PEI opportunities associated with the POs configured for the UE. Furthermore, because PEI is shared among a group of UEs, PEI may be scrambled by a group common RNTI (such as a P-RNTI).

Further, in some aspects, the information configuring paging reception for PEI-enabled UEs may include configuration information associated with TRSs, CSI-RSs, and/or other suitable reference signals that the UE may measure in order to increase reliability of decoding paging PDSCH. For example, as described above, configuration information for a TRS or CSI-RS may be signaled in SIBs other than MIB or SIB carrying information provided by a base station to enable access to a cell. For example, the SIB for indicating the configuration for the TRS or CSI-RS may be SIB11 for signaling the measurement configuration for the UE in RRC idle or inactive mode. Further, as described above, the TRS or CSI-RS configuration may be provided in signaling (e.g., broadcast signaling rather than dedicated signaling) addressed to multiple UEs in order to maximize the number of UEs receiving the TRS or CSI-RS configuration information.

In some aspects, the base station may also configure the behavior of the UE when one or more conditions are met (e.g., where the UE fails to detect or decode PEI in the PEI occasion, or where the PEI occasion is determined to be invalid). For example, in some aspects, the base station may transmit system information to indicate that in the event that the UE fails to detect PEI or PEI occasion is invalid (e.g., due to collision with a downlink reference signal or Radio Resource Management (RRM) measurement window), the UE refrains from decoding the paging message or remains awake to monitor the control channel for the paging indication of the UE. In the latter case, where the UE remains awake to monitor the control channel for paging indications of the UE, if the UE has paging, the base station may send paging DCI to the UE and may expect the UE to monitor the PDCCH for paging DCI in the PO associated with the UE.

As further shown in fig. 4C, at 432, the UE may monitor PEI in PEI occasions configured for the UE. For example, the UE may monitor the control channel for PEI scrambled by a group common RNTI (e.g., P-RNTI) during a PEI occasion located at a configured location prior to a PO associated with the UE.

As further shown in fig. 4C, at 434, the base station may transmit PEI before one or more UEs have a paging PO. For example, in the case where any UE in the group of UEs has a page, the base station may send PEI to indicate that one or more UEs in the group of UEs have a page. In addition, in case of transmitting PEI, PEI may include scheduling information of PDSCH carrying paging. Additionally or alternatively, if a PO following the PEI is associated with one or more UE groups in which no UEs have pages, the PEI sent in the PEI occasion before the PO may indicate that there are no pages for the one or more UE groups in the PO following the PEI. Alternatively, in the event that no UE has a page in a particular PO, the base station may avoid sending PEI in a PEI occasion before the particular PO. Furthermore, in the case where the base station transmits PEI, the PEI may explicitly and dynamically signal whether TRS or CSI-RS is available. For example, as described above, the base station may not always transmit the TRS or CSI-RS even when the configuration information for the TRS or CSI-RS is signaled to the UE (e.g., when there is no UE in RRC connected mode). In such cases, the PEI may signal that no TRS or CSI-RS are available so that the UE may avoid performing a power-expensive blind decoding procedure in the TRS or CSI-RS occasions when no TRS or CSI-RS is transmitted. In this way, the availability (or unavailability) of the TRS or CSI-RS may be signaled in the PEI before scheduling the POs of the paging PDSCH, which may allow the UE to determine whether to measure or avoid measuring the reference signal(s) before attempting to decode the page.

As further shown in fig. 4C, at 436, the base station may transmit one or more reference signals and/or one or more paging messages associated with the PEI. For example, as described above, the reference signals may include SSBs, TRSs, and/or CSI-RSs, among other examples, that the UE may measure to improve decoding reliability when PEI indicates that there is paging for the UE. Thus, if the UE successfully decodes PEI in the PEI occasion and the PEI indicates that there is a page for the UE group to which the UE belongs, the UE may decode PDSCH paging message at the location indicated by the PEI (e.g., the PO after the PEI occasion). Alternatively, if the PEI indicates that there is no paging for the UE, the UE may return to a sleep (e.g., idle or inactive) state to save power. Alternatively, if the UE determines that one or more conditions are met (e.g., the UE fails to detect or decode PEI, or the PEI occasion is deemed invalid due to collision with the downlink reference signal or RRM measurement window), further behavior of the UE may depend on configuration information signaled in the system information. For example, the UE may be configured to refrain from decoding the paging message if the UE fails to detect or decode PEI or the PEI occasion is deemed invalid. Alternatively, in the case where the UE is configured to monitor the PDCCH for a paging indication when the UE fails to detect or decode PEI or PEI occasion is deemed invalid, if the UE has a page, the base station may send paging DCI to the UE, and the UE may monitor the PDCCH for paging DCI in a PO associated with the UE.

As described above, fig. 4A-4C are provided as examples. Other examples may differ from what is described in connection with fig. 4A-4C.

Fig. 5 is a flow chart of an example method 500 of wireless communication. Method 500 may be performed by, for example, a UE (e.g., UE 120).

At 510, the UE may send capability information to the base station indicating whether the UE supports PEI before a PO associated with the UE, wherein the capability information further indicates a minimum gap between a first message scheduling a page and a second message carrying the page. For example, the UE (e.g., using the transmitting component 604 depicted in fig. 6) may transmit capability information to the base station indicating whether the UE supports PEI before a PO associated with the UE, wherein the capability information also indicates a minimum gap between a first message scheduling a page and a second message carrying the page, as described above, e.g., at 410 in connection with fig. 4A. In some aspects, the minimum gap includes a minimum k0 indicating a minimum offset between a first time slot in which the paging DCI message is received and a second time slot in which a second message carrying the page is scheduled. In some aspects, the first message includes a PEI message shared by a paging group of the UE that includes the UE, based at least in part on the capability information indicating that the UE supports PEI prior to a PO associated with the UE. In some aspects, the PEI message is scrambled by the group public radio network temporary identity.

At 520, the UE may monitor the control channel for the first message while in an inactive or idle state based at least in part on the capability information. For example, the UE (e.g., using the monitoring component 608 depicted in fig. 6) may monitor the control channel for the first message based at least in part on the capability information while in an inactive or idle state, as described above in connection with, for example, 422 of fig. 4B and 432 of fig. 4C. In some aspects, the first message includes a paging DCI message indicating that the UE does not support PEI before a PO associated with the UE based at least in part on the capability information.

In some aspects, the method 500 includes receiving a second message carrying a page based at least in part on scheduling information included in the paging DCI. In some aspects, the scheduling information included in the paging DCI indicates that the second message carrying the page is scheduled in a first PO that is at least a number of time slots after a PO associated with the paging DCI. In some aspects, the number of slots is a maximum of one or more minimum k0 values supported by a set of UEs with pages scheduled in a PO associated with paging DCI.

In some aspects, the method 500 includes receiving information from a base station to configure PEI opportunities prior to each PO associated with a UE paging group based at least in part on a minimum gap indicated in the capability information. In some aspects, the method 500 includes detecting a PEI message in a PEI occasion before a PO associated with a UE paging group, and determining to schedule at least one page in the PO after the PEI occasion in which the PEI message was detected. In some aspects, the PEI message indicates whether at least one page scheduled in the PO after the PEI occasion includes pages for one or more UEs in the UE paging group. In some aspects, the at least one page scheduled in the PO after the PEI occasion is indicated based at least in part on the PEI message including scheduling information for a second message carrying the at least one page.

In some aspects, the method 500 includes decoding a second message carrying at least one page based at least in part on the PEI message indicating that at least one page scheduled in the PO after the PEI occasion includes pages for one or more UEs in the UE paging group. In some aspects, the method 500 includes indicating, based at least in part on the PEI message, that at least one page scheduled in the PO after the PEI occasion does not include a paging avoidance decoding of a second message carrying the at least one page for any UE in the UE paging group. In some aspects, the method 500 includes receiving configuration information from the base station indicating that the UE is to avoid decoding the second message or monitoring the control channel for a paging indication associated with a PO following the PEI occasion that satisfies the condition; and operating according to the configuration information in the PO after the PEI opportunity satisfying the condition. In some aspects, the conditions include one or more of detecting a PEI message failure in a PEI occasion, decoding a PEI message failure in a PEI occasion, or determining that a PEI occasion is invalid. In some aspects, the method 500 includes determining that the PEI occasion is invalid based at least in part on the PEI occasion overlapping one or more of the downlink reference signals or the radio resource management measurement window.

In some aspects, the method 500 includes measuring one or more reference signals to enable reception of a second message based at least in part on detecting the first message on the control channel, wherein a configuration associated with the one or more reference signals is indicated in a SIB other than a MIB or SIB carrying information provided by the base station to enable access to the cell. In some aspects, SIBs indicating configurations associated with the one or more reference signals are addressed to multiple UEs. In some aspects, the first message indicates availability of one or more reference signals based at least in part on the capability information.

While fig. 5 shows exemplary blocks of the method 500, in some aspects, the method 500 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in fig. 5. Additionally or alternatively, two or more blocks of method 500 may be performed in parallel.

Fig. 6 is a block diagram of an exemplary apparatus 600 for wireless communication. The apparatus 600 may be a UE, or the UE may include the apparatus 600. In some aspects, the apparatus 600 includes a receiving component 602 and a transmitting component 604 that can communicate with each other (e.g., via one or more buses and/or one or more other components). As shown, apparatus 600 may communicate with another apparatus 606 (such as a UE, a base station, or another wireless communication device) using a receiving component 602 and a transmitting component 604. As further illustrated, the apparatus 600 can include one or more of a monitoring component 608, a detecting component 610, or a decoding component 612, among other examples.

In some aspects, the apparatus 600 may be configured to perform one or more operations described herein in connection with fig. 4A-4C. Additionally or alternatively, the apparatus 600 may be configured to perform one or more processes described herein, such as the method 500 of fig. 5. In some aspects, the apparatus 600 and/or one or more components illustrated in fig. 6 may include one or more components of the BS described above in connection with fig. 2. Additionally or alternatively, one or more of the components shown in fig. 6 may be implemented within one or more of the components described above in connection with fig. 2. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the functions or operations of the component.

The receiving component 602 can receive a communication, such as a reference signal, control information, data communication, or a combination thereof, from a device 606. The receiving component 602 may provide the received communication to one or more other components of the apparatus 600. In some aspects, the receiving component 602 can perform signal processing (such as filtering, amplifying, demodulating, analog-to-digital converting, demultiplexing, deinterleaving, demapping, equalizing, interference cancellation, or decoding, among other examples) on the received communication and can provide the processed signal to one or more other components of the apparatus 606. In some aspects, the receive component 602 may include one or more antennas, demodulators, MIMO detectors, receive processors, controllers/processors, memories, or a combination thereof for the UE described above in connection with fig. 2.

The transmitting component 604 can transmit a communication, such as a reference signal, control information, data communication, or a combination thereof, to the device 606. In some aspects, one or more other components of the apparatus 606 may generate a communication, and the generated communication may be provided to the sending component 604 for transmission to the apparatus 606. In some aspects, the transmitting component 604 can perform signal processing (such as filtering, amplifying, modulating, digital-to-analog converting, multiplexing, interleaving, mapping, or encoding, among other examples) on the generated communication and can transmit the processed signal to the device 606. In some aspects, the transmit component 604 can include one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers/processors, memory, or a combination thereof of the BS described above in connection with fig. 2. In some aspects, the transmitting component 604 can be collocated with the receiving component 602 in a transceiver.

The sending component 604 can send capability information to the base station indicating whether the UE supports PEI prior to a PO associated with the UE, wherein the capability information further indicates a minimum gap between a first message scheduling a page and a second message carrying the page. The monitoring component 608 can monitor the control channel for the first message based at least in part on the capability information while in an inactive or idle state.

The receiving component 602 may receive a second message carrying a page based at least in part on scheduling information included in the paging DCI.

The receiving component 602 can receive information from a base station that configures PEI occasion before each PO associated with a UE paging group based at least in part on a minimum gap indicated in the capability information.

The detection component 610 can detect the PEI message in a PEI occasion prior to the PO associated with the UE paging group. The decoding component 612 can determine to schedule at least one page in the PO after detecting the PEI occasion of the PEI message.

The decoding component 612 can decode a second message carrying at least one page based at least in part on the PEI message indicating that the at least one page scheduled in the PO after the PEI occasion includes pages for one or more UEs in the UE paging group.

The decoding component 612 can refrain from decoding the second message carrying the at least one page based at least in part on the PEI message indicating that the at least one page scheduled in the PO after the PEI occasion does not include pages for any of the UEs in the UE paging group.

The receiving component 602 can receive configuration information from the base station that instructs the UE to refrain from decoding the second message or monitor the control channel for a paging indication associated with a PO following the PEI occasion that satisfies the condition. The monitoring component 608 and/or decoding component 612 can operate in accordance with configuration information in the PO after the PEI occasion that the condition is met.

The monitoring component 608 can determine that the PEI occasion is invalid based at least in part on the PEI occasion overlapping one or more of the downlink reference signals or the RRM measurement window.

The receiving component 602 can measure one or more reference signals to enable reception of a second message based at least in part on detecting the first message on the control channel, wherein a configuration associated with the one or more reference signals is indicated in a SIB other than the MIB or the SIB carrying information provided by the base station to enable access to the cell.

The number and arrangement of components shown in fig. 6 are provided as one example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in FIG. 6. Further, two or more components shown in fig. 6 may be implemented within a single component, or a single component shown in fig. 6 may be implemented as multiple distributed components. Additionally or alternatively, the set of (one or more components) shown in fig. 6 may perform one or more functions described as being performed by another set of components shown in fig. 6.

Fig. 7 is a diagram illustrating an example 700 of a hardware implementation of an apparatus 705 for employing a processing system 710. The apparatus 705 may be a UE.

The processing system 710 may be implemented with a bus architecture, represented generally by the bus 715. The bus 715 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 710 and the overall design constraints. The bus 715 links together various circuits including one or more processors and/or hardware components, represented by the processor 720, the illustrated components, and the computer-readable medium/memory 725. The bus 715 may also link various other circuits such as timing sources, peripherals, voltage regulators, and/or power management circuits.

The processing system 710 may be coupled to a transceiver 730. The transceiver 730 is coupled to one or more antennas 735. Transceiver 730 provides a means for communicating with various other apparatus over a transmission medium. The transceiver 730 receives signals from one or more antennas 735, extracts information from the received signals, and provides the extracted information to the processing system 710 (and in particular, to the receiving component 602). In addition, transceiver 730 receives information from processing system 710 (specifically, transmission component 604) and generates signals to be applied to one or more antennas 735 based at least in part on the received information.

The processing system 710 includes a processor 720 coupled to a computer-readable medium/memory 725. The processor 720 is responsible for general processing, including the execution of software stored on the computer-readable medium/memory 725. Which, when executed by the processor 720, causes the processing system 710 to perform the various functions described herein for any particular apparatus. The computer readable medium/memory 725 may also be used for storing data that is manipulated by the processor 720 when executing software. The processing system also includes at least one of the illustrated components. These components may be software modules running in the processor 720, resident/stored in the computer readable medium/memory 725, one or more hardware modules coupled to the processor 720, or a combination thereof.

In some aspects, processing system 710 may be a component of UE 120 and may include memory 282 and/or at least one of TX MIMO processor 266, RX processor 258, and/or controller/processor 280. In some aspects, an apparatus 705 for wireless communication includes means for sending capability information to a base station indicating whether the apparatus 705 supports PEI prior to a PO associated with the apparatus 705, wherein the capability information further indicates a minimum gap between a first message scheduling a page and a second message carrying the page, and/or means for monitoring a control channel for the first message based at least in part on the capability information while in an inactive or idle state. The apparatus may be one or more of the above-described components of the apparatus 600 and/or the processing system 710 of the apparatus 705 configured to perform the functions recited by the above-described components. As described elsewhere herein, processing system 710 may include a TX MIMO processor 266, an RX processor 258, and/or a controller/processor 280. In one configuration, the foregoing components may be the TX MIMO processor 266, the RX processor 258, and/or the controller/processor 280 configured to perform the functions and/or operations described herein.

Fig. 7 is provided as an example. Other examples may differ from those described in connection with fig. 7.

The following provides an overview of some aspects of the disclosure:

aspect 1: a method of wireless communication performed by a UE, the method comprising: transmitting capability information to the base station indicating whether the UE supports PEI before a PO associated with the UE, wherein the capability information further indicates a minimum gap between a first message scheduling a page and a second message carrying the page; and monitoring a control channel for the first message while in an inactive or idle state based at least in part on the capability information.

Aspect 2: the method of aspect 1, wherein the first message comprises a paging DCI message indicating that the UE does not support PEI before a PO associated with the UE based at least in part on the capability information.

Aspect 3: the method according to aspect 2, wherein the minimum gap comprises a minimum k0 indicating a minimum offset between a first time slot in which a paging DCI message is received and a second time slot in which a second message carrying the page is scheduled.

Aspect 4: the method according to any one of aspects 2-3, the method further comprising: a second message carrying a page is received based at least in part on scheduling information included in the paging DCI.

Aspect 5: the method according to aspect 4, wherein the scheduling information included in the paging DCI indicates that the second message carrying the page is scheduled in a first PO that is at least a number of slots after a PO associated with the paging DCI.

Aspect 6: the method according to aspect 5, wherein the number of time slots is a maximum of one or more minimum k0 values supported by a set of UEs with pages scheduled in a PO associated with paging DCI.

Aspect 7: the method of aspect 1, wherein the capability information indicates that the UE supports PEI prior to a PO associated with the UE, the first message comprising a PEI message shared by a paging group of the UE including the UE.

Aspect 8: the method of aspect 7, wherein the PEI message is scrambled by a group common RNTI.

Aspect 9: the method according to any one of aspects 7-8, the method further comprising: information is received from the base station to configure PEI opportunities prior to each PO associated with the UE paging group based at least in part on the minimum gap indicated in the capability information.

Aspect 10: the method according to any one of aspects 7-9, the method further comprising: detecting a PEI message in a PEI occasion prior to a PO associated with a UE paging group; and determining to schedule at least one page in the PO after the PEI occasion of the PEI message is detected.

Aspect 11: the method of aspect 10, wherein the PEI message indicates whether at least one page scheduled in the PO after the PEI occasion includes pages for one or more UEs in the UE paging group.

Aspect 12: the method of any of aspects 10-11, wherein the at least one page scheduled in the PO after the PEI occasion is indicated based at least in part on the PEI message including paging PEI messages for one or more UEs in the UE paging group, the PEI messages including scheduling information for a second message carrying the at least one page.

Aspect 13: the method according to any one of aspects 10-12, the method further comprising: the method further includes decoding a second message carrying the at least one page based at least in part on the PEI message indicating that the at least one page scheduled in the PO after the PEI occasion includes a page for one or more UEs in the UE paging group.

Aspect 14: the method according to any one of aspects 10-12, the method further comprising: the method further includes refraining from decoding a second message carrying the at least one page based at least in part on the PEI message indicating that the at least one page scheduled in the PO after the PEI occasion does not include pages for any UEs in the UE paging group.

Aspect 15: the method according to any one of aspects 7-14, the method further comprising: receiving configuration information from the base station, the configuration information indicating that the UE refrains from decoding the second message or monitors the control channel for a paging indication associated with a PO following a PEI occasion that satisfies the condition; and operating according to the configuration information in the PO after the PEI opportunity satisfying the condition.

Aspect 16: the method of aspect 15, wherein the condition comprises one or more of detecting a PEI message failure in a PEI occasion, decoding a PEI message failure in a PEI occasion, or determining that a PEI occasion is invalid.

Aspect 17: the method according to aspect 16, the method further comprising: the PEI occasion is determined to be invalid based at least in part on the PEI occasion overlapping one or more of the downlink reference signal or the RRM measurement window.

Aspect 18: the method according to any one of aspects 1-17, the method further comprising: one or more reference signals are measured to enable receipt of a second message based at least in part on detecting the first message on the control channel, wherein a configuration associated with the one or more reference signals is indicated in a SIB other than a MIB or SIB that carries information provided by the base station to enable access to the cell.

Aspect 19: the method of aspect 18, wherein the SIB indicating the configuration associated with the one or more reference signals is addressed to a plurality of UEs.

Aspect 20: the method of any of aspects 18-19, wherein the first message indicates availability of one or more reference signals based at least in part on the capability information.

Aspect 21: an apparatus for wireless communication at a device, the apparatus comprising a processor; a memory coupled to the processor; and instructions stored in a memory and executable by a processor to cause an apparatus to perform the method of any one of aspects 1-20.

Aspect 22: an apparatus for wireless communication, the apparatus comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to perform the method according to any one of aspects 1-20.

Aspect 23: an apparatus for wireless communication, the apparatus comprising at least one means for performing the method according to any one of aspects 1-20.

Aspect 24: a non-transitory computer readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of any one of aspects 1-20.

Aspect 25: a non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of any of aspects 1-20.

The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of the aspects.

As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and/or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, and/or a combination of hardware and software. It is apparent that the systems and/or methods described herein may be implemented in different forms of hardware, firmware, and/or combinations of hardware and software. The actual specialized control hardware or software code used to implement the systems and/or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and/or methods were described herein without reference to the specific software code-it being understood that software and hardware can be designed to implement the systems and/or methods based at least in part on the description herein.

As used herein, satisfying a threshold may refer to greater than a threshold, greater than or equal to a threshold, less than or equal to a threshold, not equal to a threshold value, etc., depending on the context.

Although specific combinations of features are recited in the claims and/or disclosed in the specification, such combinations are not intended to limit the disclosure of the different aspects. Indeed, many of these features may be combined in ways not specifically recited in the claims and/or disclosed in the specification. Although each of the dependent claims listed below may depend directly on only one claim, disclosure of a different aspect includes each dependent claim in combination with each other claim of the set of claims. As used herein, a phrase referring to "at least one" in a list of items refers to any combination of those items, including individual members. As an example, "at least one of a, b, or c" is intended to encompass: a. b, c, a-b, a-c, b-c, and a-b-c, as well as any combination having a plurality of identical elements (e.g., a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b-b, b-b-c, c-c, and c-c-c, or any other ordering of a, b, and c).

No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Moreover, as used herein, the articles "a" and "an" are intended to include one or more items, and may be used interchangeably with "one or more". Furthermore, as used herein, the article "the" is intended to include, and be used interchangeably with, one or more items referenced in connection with the article "the. Furthermore, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, non-related items, combinations of related and non-related items), and may be used interchangeably with "one or more". Where only one item is intended, the phrase "only one" or similar language is employed. Also, as used herein, the term "having" and the like are intended to be open-ended terms. Furthermore, the phrase "based on" is intended to mean "based, at least in part, on" unless explicitly stated otherwise. Furthermore, as used herein, the term "or" when used serially is inclusive and is used interchangeably with "and/or" unless otherwise specifically indicated (e.g., if used in combination with "either of the two" or "only one of the two").

Claims (30)

1. A user equipment, UE, for wireless communication, comprising:

a memory; and

one or more processors coupled to the memory configured to:

transmitting capability information indicating whether the UE supports paging advance indication PEI before a paging occasion PO associated with the UE to a base station, wherein the capability information further indicates a minimum gap between a first message scheduling paging and a second message carrying the paging; and

a control channel is monitored for the first message while in an inactive or idle state based at least in part on the capability information.

2. The UE of claim 1, wherein the first message comprises a paging downlink control information, DCI, message based at least in part on the capability information indicating that the UE does not support the PEI prior to the PO associated with the UE.

3. The UE of claim 2, wherein the minimum gap comprises a minimum k0 indicating a minimum offset between a first time slot in which the paging DCI message is received and a second time slot in which the second message carrying the page is scheduled.

4. The UE of claim 2, wherein the one or more processors are further configured to:

The second message carrying the page is received based at least in part on scheduling information included in the paging DCI.

5. The UE of claim 1, wherein the first message comprises a PEI message shared by a UE paging group comprising the UE, based at least in part on the capability information indicating that the UE supports the PEI prior to a PO associated with the UE.

6. The UE of claim 5, wherein the PEI message is scrambled by a group public wireless network temporary identity.

7. The UE of claim 5, wherein the one or more processors are further configured to:

information is received from the base station to configure PEI opportunities prior to each PO associated with the UE paging group based at least in part on the minimum gap indicated in the capability information.

8. The UE of claim 5, wherein the one or more processors are further configured to:

detecting a PEI message in a PEI occasion prior to a PO associated with the UE paging group; and

determining to schedule at least one page in the PO after detecting the PEI occasion of the PEI message.

9. The UE of claim 8, wherein the PEI message indicates whether the at least one page scheduled in the PO after the PEI occasion includes pages for one or more UEs in the UE paging group.

10. The UE of claim 8, wherein the at least one page scheduled in the PO after the PEI occasion based at least in part on the PEI message indication comprises a page for one or more UEs in the UE paging group, the PEI message comprising scheduling information for the second message carrying the at least one page.

11. The UE of claim 8, wherein the one or more processors are further configured to:

decoding the second message carrying the at least one page based at least in part on the PEI message indicating that the at least one page scheduled in the PO after the PEI occasion includes pages for one or more UEs in the paging group of UEs.

12. The UE of claim 8, wherein the one or more processors are further configured to:

decoding the second message carrying the at least one page is avoided based at least in part on the PEI message indicating that the at least one page scheduled in the PO after the PEI occasion does not include pages for any UEs in the UE paging group.

13. The UE of claim 5, wherein the one or more processors are further configured to:

Receiving configuration information from the base station, the configuration information indicating that the UE refrains from decoding the second message or monitors the control channel for a paging indication associated with a PO following a PEI occasion that satisfies a condition; and

and operating in the PO after the PEI opportunity meeting the condition according to the configuration information.

14. The UE of claim 13, wherein the condition comprises one or more of detecting a PEI message failure in the PEI occasion, decoding a PEI message failure in the PEI occasion, or determining that the PEI occasion is invalid.

15. The UE of claim 1, wherein the one or more processors are further configured to:

one or more reference signals are measured to enable reception of the second message based at least in part on detecting the first message on the control channel, wherein a configuration associated with the one or more reference signals is indicated in a SIB other than a master information block or a system information block SIB carrying information provided by the base station to enable access to a cell.

16. The UE of claim 15, wherein the SIB indicating the configuration associated with the one or more reference signals is addressed to a plurality of UEs.

17. The UE of claim 15, wherein the first message indicates availability of the one or more reference signals based at least in part on the capability information.

18. A method of wireless communication performed by a user equipment, UE, comprising:

transmitting capability information indicating whether the UE supports paging advance indication PEI before a paging occasion PO associated with the UE to a base station, wherein the capability information further indicates a minimum gap between a first message scheduling paging and a second message carrying the paging; and

a control channel is monitored for the first message while in an inactive or idle state based at least in part on the capability information.

19. The method of claim 18, wherein the first message comprises a paging downlink control information, DCI, message based at least in part on the capability information indicating that the UE does not support the PEI prior to the PO associated with the UE.

20. The method of claim 19, wherein the minimum gap comprises a minimum k0 indicating a minimum offset between a first time slot in which the paging DCI message is received and a second time slot in which the second message carrying the page is scheduled.

21. The method of claim 19, further comprising:

the second message carrying the page is received based at least in part on scheduling information included in the paging DCI.

22. The method of claim 18, wherein the capability information indicates that the UE supports the PEI prior to a PO associated with the UE, the first message comprising a PEI message shared by a UE paging group comprising the UE.

23. The method of claim 22, wherein the PEI message is scrambled by a group public wireless network temporary identity.

24. The method of claim 22, further comprising:

information is received from the base station to configure PEI opportunities prior to each PO associated with the UE paging group based at least in part on the minimum gap indicated in the capability information.

25. The method of claim 22, further comprising:

detecting a PEI message in a PEI occasion prior to a PO associated with the UE paging group; and

determining to schedule at least one page in the PO after detecting the PEI occasion of the PEI message.

26. The method of claim 25, wherein the PEI message indicates whether the at least one page scheduled in the PO after the PEI occasion includes pages for one or more UEs in the UE paging group, and wherein the at least one page scheduled in the PO after the PEI occasion based at least in part on the PEI message indicates paging for one or more UEs in the UE paging group, the PEI message including scheduling information for the second message carrying the at least one page.

27. The method of claim 22, further comprising:

receiving configuration information from the base station, the configuration information indicating that the UE refrains from decoding the second message or monitors the control channel for a paging indication associated with a PO following a PEI occasion that satisfies a condition; and

and operating in the PO after the PEI opportunity meeting the condition according to the configuration information.

28. The method of claim 18, further comprising:

one or more reference signals are measured to enable reception of the second message based at least in part on detecting the first message on the control channel, wherein a configuration associated with the one or more reference signals is indicated in a SIB other than a master information block or a system information block SIB carrying information provided by the base station to enable access to a cell.

29. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:

one or more instructions that, when executed by one or more processors of a user equipment, UE, cause the UE to:

transmitting capability information indicating whether the UE supports paging advance indication PEI before a paging occasion PO associated with the UE to a base station, wherein the capability information further indicates a minimum gap between a first message scheduling paging and a second message carrying the paging; and

A control channel is monitored for the first message while in an inactive or idle state based at least in part on the capability information.

30. An apparatus for wireless communication, comprising:

means for sending capability information to a base station indicating whether the apparatus supports paging advance indication, PEI, prior to a paging occasion, PO, associated with the apparatus, wherein the capability information further indicates a minimum gap between a first message scheduling a page and a second message carrying the page; and

means for monitoring a control channel for the first message while in an inactive or idle state based at least in part on the capability information.